I've mentioned it in previous posts, but I was only ever caught once. I've never told the full story so might as well now.
When I was a teenager and just getting the confidence to indulge this side of myself, my mother on a whim decided to completely overhaul my room, she must've been on a Feng-Shui trip or something.
I kept a stash of baby items in my dresser, you could slide the drawers right out and there were cavities in behind them, that's where I kept my things, it was a great hiding place for almost my entire high-school life. Well, she removed the drawers to make the dresser easier to move and saw a ton of baby items; pacifiers, rattles, bibs, stuffed animals, baby bottles. She had known I had an interest in childish things before (I liked cartoons, I played with toys still, I had a slightly immature sense of humour) and she would frequently tell me to grow up, but coming face to face with my stash must've been too much for her, she just couldn't understand.
When I came home, she gave me that tell-tale disappointed voice and told me to come into my room. She confronted me with my entire stash lying on my bed. I tried to explain these interests and lay them out for her, but she didn't want to hear any of it. She proceeded to give me a heated lecture about how it isn't "normal" for big boys to be interested in little things. I believe she ended this speech by looking up at the skies and shrieking, "why me, why couldn't I have a normal son", that one hurt.
To make matters worse, she then blabbed about this to my immediate family; aunt's, cousins and grandparents, some proceeded to reiterate what my mother had told me, others simply teased me relentlessly, I was extremely embarrassed. I think in my mother's mind, if I was made to feel ashamed of these interests, I would stop... well, it didn't work and I'm a happier person for it, I like being a baby when time allows.
To this day, I haven't brought this up again and she doesn't know the whole story about my AB side. We have a surprisingly good relationship now, but the memory of this event still stings. I am thankful however, that I didn't have any diapers stashed away at that time, I had just run out of them. If she flew off the handle over a few baby toys, I can only imagine how she would have reacted if she found diapers on top of it (shudders)